Hf6 Si4

semiconductor

· Hf6 Si4

Hf6Si4 is a hafnium silicide intermetallic compound that belongs to the refractory ceramic family, combining the high-temperature stability of hafnium with silicon's covalent bonding characteristics. This material is primarily of research and developmental interest for ultra-high-temperature structural applications where conventional superalloys reach their limits, particularly in aerospace and hypersonic vehicle programs. Hafnium silicides are valued for their potential to maintain mechanical integrity at extreme temperatures while offering oxidation resistance, though they remain largely experimental compared to established alternatives like nickel-based superalloys or tungsten composites.

hypersonic vehicle structuresadvanced rocket enginesultra-high-temperature coatingsthermal protection systemsexperimental aerospace applicationsrefractory composites research

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	144.8	GPa	—
Shear Modulus(G)	95.29	GPa	—

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.00660	eV	—

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-0.7340	eV/atom	—

Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Export Control

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

Hf6 Si4

Mechanical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control